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    (Original post by anon123)
    i think that wen u got 433 u multiplied it by 0.8 to get the answer, nt sure tho
    so is it right? cuz i took 390 as being 0.9 out of 1 and 1 represented 0.8 of french students.lol.
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    whoops theres another 3 marks gone!!!!but wait 390 mulitiplied by 0.8 is 312???
    ahh well its over now, if i've done badly c'est la vie!

    but at the same time i hope every1 else has done badly so i'll bring the grade boundaries down!!!!lol!

    lookin back maybe it wasnt too bad, histogram was fine and cumalative frequency step ok i think!did ever1 get 13(think it was 13 maybe i'm wrong) for the median?
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    ****ing hell. the paper was really hard. questions were sneaky unlike other past papers. past papers asked u straightforward to calculate something. in this exam they asked something else and u had to use formulas.it was sooo unfair they gave only 4 marks to the questions where we had to find s.d and mean. they were like the hardest ones.should be 7 marks.
    the questions about probability i did with proportions
    if 390 is 0.9
    then x is 1
    therefore x = 390*1/0.9
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    I dont seem to recognise any of these numbers people are coming out with ... Im rather worried now!
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    i ****ing dont recognise anything. I honestly ****ed up it.I sooo didnt want it. ahhhhhh. God wanted to make a joke of me.this is outrageous.
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    Ok there were about 4500 fish in the pond? Cant remeber the exact number but something between 4000 - 5000.

    The probability of someone being good at spanish was 0.24?
    Cant remeber what the last probability question was!
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    i think it was like 0.8*0.9+0.2*0.3
    lol
    so it is 0.78
    i dont know for sure.
    for fish pond it was something like
    300/14 and then times 100. I dont know whether it is right.lol.
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    (Original post by IZZY!)
    i ****ing dont recognise anything. I honestly ****ed up it.I sooo didnt want it. ahhhhhh. God wanted to make a joke of me.this is outrageous.
    don't worry ppl- we all screwed up! well, apart from the snotty year 10s at my school who think they're so great cos they finished 40 mins early (tho i bet they got half of it wrong anyway). as for God- what have u done to **** him off lately? i'd vouch for satan being the one to make a mockery of u...if it makes anyone feel better u only needed 129 out of 160 (with coursework) to get an A* last year.
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    omg. thats like 80% for an A*. too much, I ****ed up.lol.
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    Thinking about it ive worked out that the fish was 2109?

    The question was - 100 fish pulled out and all tagged?
    Then 300 were pulled out and 14 had tags.
    How many fish in the pond?

    So 300 = 14 tagged.
    So 600 would mean 28 tagged
    1200 = 56 tagged
    1800 = 84 tagged
    2100 = 98 tagged
    and an extra two is 2109.333 to give the 100 tagged?

    This gives 2109 because you cant have 1/3 of a fish?
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    omg, this looks right.i ****ed up honestly.
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    I didnt write that in the exam though - I somehow worked out about 4000! in the exam. Now i feel different! Dam IT!
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    (Original post by Davror)
    Thinking about it ive worked out that the fish was 2109?

    The question was - 100 fish pulled out and all tagged?
    Then 300 were pulled out and 14 had tags.
    How many fish in the pond?

    So 300 = 14 tagged.
    So 600 would mean 28 tagged
    1200 = 56 tagged
    1800 = 84 tagged
    2100 = 98 tagged
    and an extra two is 2109.333 to give the 100 tagged?

    This gives 2109 because you cant have 1/3 of a fish?

    I used the formula: no. tagged divided by total population= no. recaptured that were tagged divided by total recaptured....

    so 100 divided by tp = 14 divided by 300 (0.46666666etc)

    rearrange:
    100 divided by 0.466666etc =total population
    so tp =2142.857......hope that's right!
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    **** it. i wanna shoot myself. I self taught myself, spending 2 hours every day. It feels so **** I ****ed up. I rly wanted a high grade, but now I see it is over. BTw what did u get for standard deviation and mean? I got 180 for mean and something like 30 with something for s.d.
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    (Original post by Gothic pixie)
    I used the formula: no. tagged divided by total population= no. recaptured that were tagged divided by total recaptured....

    so 100 divided by tp = 14 divided by 300
    (0.46666666etc)

    rearrange 100 divided by 0.466666etc =total population
    so tp =2142.857......hope that's right!
    ahhh i got the same thing.
    i divided 300 by 14 and then timed it by 100.lol.
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    (Original post by IZZY!)
    **** it. i wanna shoot myself. I self taught myself, spending 2 hours every day. It feels so **** I ****ed up. I rly wanted a high grade, but now I see it is over. BTw what did u get for standard deviation and mean? I got 180 for mean and something like 30 with something for s.d.
    That's true dedication! i just read the revision guide! think i got 180.5 for mean and something like 31.4 for std dev but not too sure...probably made a mistake somewhere anyway...
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    for the spanish and frrench one i got 400 which im pretty sure is right
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    (Original post by Gothic pixie)
    That's true dedication! i just read the revision guide! think i got 180.5 for mean and something like 31.4 for std dev but not too sure...probably made a mistake somewhere anyway...
    yep i got same answers. it was too hard to find s.d.
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    390 good at spanish
    p(good at spanish)=0.78
    that means 500 people alltogether ( 390/0.78=500)
    p(french)=0.8
    0.8x500=400
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    ****.**** ****.
 
 
 
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